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Proceedings Paper

Design of a night vision system with laser illumination based on DSP
Author(s): Yang Liu; Wen Xiao; Haiyang Wang
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Paper Abstract

According to characteristics of infrared imaging in darkness, a night vision system with laser illumination based on embedded structure was developed. The system detected remote target at night with a high-power infrared semiconductor laser diode as illuminating source, overcoming the defect of weak energy in passive imaging system. A reliable driver was designed to stabilize output power of the laser. Technologies were adopted to improve performance of the source greatly, such as slow start-up circuit, current interruption protection and over-current limit circuit. The illuminating source met the needs of detection in various distances and achieved satisfying transmission effect. The imaging part, where TMS320C6713 served as the center processor, realized functions of image capture, processing and export. As is known, infrared image has defects of small dynamic range and low contrast. Otherwise, the source, environment and electronic devices brought various noises that reduced image quality. Algorithms of image enhancing and noise inversion were designed correspondingly, which filtered noises and restrained background influences to gain high contrast of the target. Compared with traditional image processing based on computer, the adoption of DSP not only greatly improved image quality, but also made this system miniature and portable. The system could capture real-time image of remote target in 3~5km accurately in starless nights or under poor weather conditions.

Paper Details

Date Published: 22 February 2008
PDF: 9 pages
Proc. SPIE 6622, International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology, 66221M (22 February 2008); doi: 10.1117/12.790905
Show Author Affiliations
Yang Liu, Beijing Univ. of Aeronautics and Astronautics (China)
Wen Xiao, Beijing Univ. of Aeronautics and Astronautics (China)
Haiyang Wang, Beijing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 6622:
International Symposium on Photoelectronic Detection and Imaging 2007: Laser, Ultraviolet, and Terahertz Technology

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